Why Do Helium Balloons Deflate So Quickly and How Do Balloons Filled With Air Stay Inflated Longer?
Helium gas is not only very light, it is monatomic, its particles are all made of a single atom. As a result, helium is made up of the smallest gaseous particles possible. The atoms are only 0.1 nanometre in diameter, and are quite capable of diffusing through metal films. Because it so readily diffuses through small pores, heli
